Swell check for looms



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EMMANUEL LAVALLEE, OE PAWTUCKET, RHODE ISLAND.

SVJELL CHECK FUR. LOGMS.

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" Specification of Letters Patent. Patented F b 28 1922 Application filed December e, 1919. Serial No. seas i4.

trance of the shuttle into the shuttle box, but

for preventing rebound of the shuttle in the box and to lock the shuttle in the box until the next stroke or the picker, wherein the pressure of the check is yie'ldable, permitting comparatively free passage of the shuttle in one direction, but braking lts passage in the other, and wherein the extent of the braking action maybe varied.

In the drawings:

Figure 1 is a plan view'ofthe improved check;

Figure 2 is a section turned 90 degrees to the right, and Figures 3 'and'& are sections on the lines 22,' and 4-4; respectively,

or Figure 1.

In the present embodiment of the invention the shuttle check comprises a body 1 provided with a hub 1 which'turns on a vertical ,binder' stud' 2, said body' be ng adaptedthrough the medium of the usual protector rod which turns in journals on the under side ofthe lay-beanrto raise or hit the dagger so that the same will normally be raised clear of the frog by a shuttle 1n either box pressing the corresponding body against a dagger rod finger not shown, but when a shuttle is in neither box, the dagger is down andin theforwardmovement of the lay will strike said frog and move the same to throw the lever out of itsholding notch and stop the loom, all of the above named parts being of the usual constructionand operation except as hereinafter described. The body or hinder 1' is provided intermediate its ends with apassage 2,

throughlwhich extends a lug 3 on the supplemental .or secondary swell 4:. The swell, as shown more particularly 1n Figure 2, is pivoted to-the body bymean's of this lug 3,

a'screwbolto being passed through register- :ing openings inthe lug and in the body and being engagedby a'nut 6, atthe opposite face of the bodyor may consist of a stud therein the under face of with a head on one end and a screw on the other and threaded in so as to retain the swell in position.

The lug 8 has an extension 7 at one end,

through which is threaded a set'screw 8,

and the free end of this set screw engages a rabbet 9 at the forward end of; the passage 2 to limit the inward or lateral movement or projection of the swell.

A lock nut 10 is threaded onto the set screw, for holding it in adjusted position,

and the outer end of the swell is normally pressed inward by means of a spring 11. This spring-is secured at oneend tothe body by means of a screw 12 and a machine screw or bolt and nut 13, and the spring extends or is curved over the, projecting end of the a socket provided,

lug 3 adjacent the pivot5 thereof and the r free end of the spring bears against the lug 3 at. its free end at its junction with the extension '7 That portion ofthe inner face of the bodyl toward the outer end thereof formin'g'a swell is covered with a layer 14 of leatheror other material having a high co eflicient of friction.

The picker seek indicated at 18 we in,

the slot 19in thelshuttle box 15.,

Referring toi Figure 1, it will be. seen that ;by meansof the set screw thejswell' may be so adjusted that it will exercise just the proper degree ofbralring action on the shut I tle when it is driven into the shuttle box, indicated at 15;, to prevent rebound of the shuttle; The swell acts in somewhat the manner ofa pawl, permitting the free Lentrance of the shuttleto the box, but opposing its passage from the box. 7 It will be understood that the improved check forms a portion of the rear wall of the shuttlebox as indicated in Figure 1. The front wall of the box is formed by a plate 16, adjustably connected with the box as indicated at 17. The body 1 is pivoted at its outer end tothe lay upon the top plate 15 secured thereto, as

indicated at l, 2 It is also to be under-- I claim: V 1. In a swell check for looms, a pivoted body, means for causing the body to be' yieldingly pressed inward throughout its length, said body having a swell and having a slot near its pivoted end, a supplemental swell having a lug extending through the slot and pivoted near its outer end for movement therein, said supplemental swell being disposed adjacent to the swell of the body and adapted for movement with respect thereto, a spring normally acting to force the inner end of the supplemental swellinwardly, and means for adjusting and limiting the move- 1 mentof the supplemental swell on its pivot,

said body having a rabbeted portion at the outside thereof beyond the inner endof the lug, said lug having an extension disposed in the rabbeted portion, and a set screw engaged through the extensions having means for adjustably looking it in position through.

ing a swell and having a reduced portion forming a recess at the inner side and a slot horizontally throughthe same at the inner end of the recess, a supplemental swell having a lug pivoted in the slot, said pivot ex tending vertically and permitting movement of the lug onaho-rizontal plane, said swell providedIwiththe lug cooperating with the swellof the body and movable with respect thereto, a spring secured on. the. outer edge of the body and curved over and acting at its free end upon. the free rear endof the lug to normally project the supplemental swell with respect to the body, and means cocting between the lug and the bodyto limit the inward movement of the lug and the projection of the supplemental swell.

The combination with a loom having a lay plate. for receiving the shuttle and a picking mechanism, a checking device comprising a pivoted body carried by the plate, means for causing the pivoted body to be yieldingly pressed inward throughout its length, said body having a swell at itsfree end. and inner face and having a reduced portion forming a recess at the inner sidethereof adjacent to the pivot, said body having a slot horizontally through the same at the inner end of the recess, a supplemental swell having a lug pivoted in the slot, a

spring secured in the outer edge of the body and curved over and acting at its free end upon the free rear end of the lug to normally project the swell with respect to the swell of the body, said lug having an extension provided with a threaded aperture, said aperture extending horizontally, said body having a recess forming a stop shoulder facing the extension at the aperture, a set screw engaged in the aperture to contact with the wall ofthe recess forming the stop shoulder, and a nut on the screw for engaging the edge of the lug extension to hold the screw in an adjusted position, as and for the purposes specified. 7

4. In a swell check for looms, the combination with a loom; ofa shuttle box or top.

plateor a lay having a slot, a picker stick operating in said slot, said shuttle box having a stationary wall and a cover; plate; of a body pivoted at one end upon the plate and forming the opposite wall disposed upon the opposite side of the slot with respect to the first named wall for receiving the shuttle therebetween, saidbody comprising a swell near the free inner end thereof, and an auxiliary check swell carried by the body and movable independently of and with respect to the swell of said body to supplement the checking action thereof with respect to the shuttle, said auxiliary checkswellbeing adjustably limited in its inward movement.

5. The combination with a shuttlebox or top plate of a lay; of a check forming a portion of one wall thereof and comprising a body pivoted at its outer end to the "outer end of the box or plate,"saidbody having a horizontal slot in the median plane of the box and body and providedwith a swell ioo near'the free end thereof, a supplemental swell pivoted in the slotintermediate the ends thereof, a spring normally acting to ,force the inner end of the body inwardly, and inter-engaging means in connection with the body andswell forlimiting the inward movement of said end of the swell with respect to the body, said inter-engaging means 7 comprising an extensionlug on the inner end of theswell, the body being .rabbeted to receive the extension lug, and a set screw threaded through the extension lug for engaging the .Wall of the rabbet. V

6. In a swell check for looms, a shuttle check, means for causing the shuttle check to be yieldingly pressed inward throughout its entirety, said check'having aswell and having a slot near its pivoted end,a supple- ,mental swell having a lug extending throu h the slot and pivoted near its outer end or movement therein, a spring normally actin to force'the inner end of the supplementa swells inwardly, and means for adjustably varying and limiting the inward movement of said supplemental swell on its pivot.

7. In a swell check forlooms, a shuttle check, means forcausing it to beyieldingly pressed inward throughout its entirety, said check having a swell and having a slot near 130 its pivoted end, a supplemental swell having a lug extending through the slot and pivoted near its outer end for movement therein, a spring normally acting to force the inner end of the supplemental swell inwardly, and means carried by the inner end of the supplemental swell and cooperating with the shuttle check for adjusting and limiting the inward movement of said supplemental swell on its pivot.

8. In a swell check for looms, a shuttle check comprising an elongated rigid body pivoted eccentricallyupon the top plate of a loom lay adjacent to the picker stick slot and shuttle, and having a swell near the free inner end thereof, a supplemental check swell carried by the body adjacent to the pivoted end thereof and having its swell disposed for movement within and beyond the plane of the engaging portion or swell of the body, spring means for projecting the supplemental swell, rigid means for limiting the projection of the supplemental swell beyond the engaging edge of the body and independently of the pivotal movement of the latter, and rigid means for positively regulating the degree of projection of said supplemental swell with respect to the body,

independently of the spring means, said means coacting between the inner end of the supplemental swell and the adjacent portion of the shuttle check body.

EMMANUEL LAVALLEE. 

